鼠标交互
1、鼠标交互
案例位置：examples/Cuda/Tutorials/GL_MouseInteraction
功能介绍：该功能主要用于展示鼠标点击事件。案例展示了 CustomMouseInteraction 类的的基本使用。
案例说明：当鼠标在仿真界面中点击时，后台程序打印出鼠标点击的位置信息。同时当鼠标选中多个实例时，系统能将选中的实例的数量显示出来。
2、程序实现
- 创建场景图:
std::shared_ptr<SceneGraph> scn = std::make_shared<SceneGraph>();
- 创建仿真实例模型：
auto triSet = std::make_shared<TriangleSet<DataType3f>>();
triSet->loadObjFile(getAssetPath() + "armadillo/armadillo.obj");
for (uint i = 0; i < 5; i++)
{
Transform3f tm;
tm.translation() = Vec3f(0.4 * i, 0, 0);
tm.scale() = Vec3f(1.0 + 0.1 * i, 1.0 - 0.1 * i, 1.0);
tm.rotation() = Quat<float>(i * (-0.2), Vec3f(1, 0, 0)).toMatrix3x3();
auto node = scn->addNode(std::make_shared<TransformNode>());
node->setName("TN-" + std::to_string(i));
//node->loadMesh("armadillo/armadillo.obj");
node->setMesh(triSet);
node->setTransform(tm);
auto sm = std::make_shared<GLInstanceVisualModule>();
sm->setColor(Vec3f(i * 0.2f, i * 0.2f, 1.f - i * 0.1f));
sm->setAlpha(0.8f);
node->setSurfaceVisualModule(sm);
}
scn->setUpperBound({ 4, 4, 4 });
- 创建鼠标交互相应事件：
void CustomMouseInteraction::onEvent(PMouseEvent event)
{
if (event.actionType == AT_PRESS)
{
printf("Mouse pressed: Origin: %f %f %f; Direction: %f %f %f \n", event.ray.origin.x, event.ray.origin.y, event.ray.origin.z, event.ray.direction.x, event.ray.direction.y, event.ray.direction.z);
}
else if (event.actionType == AT_RELEASE)
{
printf("Mouse released: Origin: %f %f %f; Direction: %f %f %f \n", event.ray.origin.x, event.ray.origin.y, event.ray.origin.z, event.ray.direction.x, event.ray.direction.y, event.ray.direction.z);
}
else
{
printf("%f %f \n", event.x, event.y);
printf("Mouse repeated: Origin: %f %f %f; Direction: %f %f %f \n", event.ray.origin.x, event.ray.origin.y, event.ray.origin.z, event.ray.direction.x, event.ray.direction.y, event.ray.direction.z);
}
}